Introduction to Principal Components Analysis

Date

1999

Authors

Francis, Paul
Wills, Beverly J.

Journal Title

Journal ISSN

Volume Title

Publisher

Astronomical Society of the Pacific

Abstract

Understanding the inverse equivalent width - luminosity relationship (Baldwin Effect), the topic of this meeting, requires extracting information on continuum and emission line parameters from samples of AGN. We wish to discover whether, and how, different subsets of measured parameters may correlate with each other. This general problem is the domain of Principal Components Analysis (PCA). We discuss the purpose, principles, and the interpretation of PCA, using some examples from QSO spectroscopy. The hope is that identification of relationships among subsets of correlated variables may lead to new physical insight.

Description

Keywords

Citation

Source

ASP Conference Series

Type

Conference paper

Book Title

Quasars and Cosmology, ASP Conference Series 162

Entity type

Access Statement

Open Access

License Rights

DOI

Restricted until